0 the act of considering something to be not at all important or useful - used mainly as an example of a very long word: --
The word "floccinaucinihilipilification" means "the estimation of something as worthless". It's an 18th-century coinage that combines four Latin prefixes meaning "nothing".
I used floccinaucinihilipilification in an essay once and the teacher wrote in the margin "I'm not giving you extra marks for this."
Senator Jesse Helms used the delightful word "floccinaucinihilipilification".